How to use Collections.max () to find the maximum of Java
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Rely on Collections.max () implementation
You can also find the maximum and minimum values using the Collections collection utility class, but before using it, we want to convert an array (Array) to a collection (List), as follows:
Import org.apache.commons.lang3.ArrayUtils
Import java.util.Arrays
Import java.util.Collections
Public class ArrayMax {
Public static void main (String [] args) {
Int [] arr = {3,7,2,1,-4}
Int max = findMaxByCollections (arr); / / find the maximum value based on Collections
System.out.println ("Max is:" + max)
}
/ * *
* find the maximum value based on Collections
* @ param arr Array to be queried
* @ return maximum
, /
Private static int findMaxByCollections (int [] arr) {
List list = Arrays.asList (
Org.apache.commons.lang3.ArrayUtils.toObject (arr))
Return Collections.max (list)
}
}
The results of the above procedures are as follows:
The maximum is: 7
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